I'm experiencing this bug too. My phone is a BQ Aquaris E5 HD Ubuntu Edition. My phone service is Consumer Cellular, which I think uses the AT&T network. I'd gladly post any log files if I knew how to access them.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to messaging-app in Ubuntu. https://bugs.launchpad.net/bugs/1532899 Title: Group chat sometimes misses messages with Unknown Number Message not found Status in Canonical System Image: Confirmed Status in messaging-app package in Ubuntu: Invalid Status in nuntium package in Ubuntu: Confirmed Status in ubuntu-download-manager package in Ubuntu: Confirmed Bug description: This happened the last two times I received group chat messages. Several messages were not listed in the chat but rather under an Unknown Number contact with content Message no found. I see 4 such entries for the time covered in the log files. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1532899/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
